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发明名称
RFID tag, study device and System and Method for language education using these
摘要
申请公布号
KR101158091(B1)
申请公布日期
2012.06.22
申请号
KR20050077788
申请日期
2005.08.24
申请人
发明人
分类号
G09B7/00
主分类号
G09B7/00
代理机构
代理人
主权项
地址
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